Of the two, I think Narci is the stronger commander: it's easy to fill the deck full of sagas and enchantments that sacrifice themselves and then you've got a very reliable and consistent card draw engine in the command zone

Binding the Old Gods Chevill, Bane of Monsters Elderfang Venom Garruk, Apex Predator Garruk, the Veil-Cursed Gift of the Deity Glissa Sunslayer Glissa, Herald of Predation Glissa, the Traitor Grist, the Plague Swarm Hapatra, Vizier of Poisons Infuse with Vitality Kagha, Shadow Archdruid Korozda Gorgon Leyline Prowler Necrogen Rotpriest Ochran Assassin Pharika, God of Affliction Pick Your Poison (playtest) Pitiless Gorgon Poison-Tip Archer Putrid Pals Rakish Scoundrel Reaper of the Wilds Shelob, Child of Ungoliant Sluiceway Scorpion Status // Statue Status // Statue The Gitrog Monster The Most Dangerous Gamer The Serpent Society The Swarmweaver Tyvar the Bellicose Undercity Uprising Vraska Joins Up Vraska, Swarm's Eminence Vraska, the Silencer Winter, Cynical Opportunist Witherbloom, the Balancer
Svardborg, Jarl Storvald
Urza is also an outlet for that mana
Cass, Hand of Vengeance I feel like Cass, Hand of Vengeance works better with auras than equipment